Apparatus for measuring velocity of a moving image or object

Details Apparatus for measuring velocity of a moving image or object Apparatus for measuring velocity of a moving image or object

1983-06-30

1986-04-08

Buczinski, Stephen C.

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

356152, G01P 336

Patent

active

045808945

ABSTRACT:
Apparatus for measuring the velocity of a moving image or object including a first array of sensors extending in a first direction transverse to image motion for sensing a primary set of image elements; a second array of sensors extending generally in the first direction and spaced a known distance from the first array for sensing successive sets of image elements; a device for correlating the primary set of image elements with each of the successive sets of image elements and for producing a correlation level indicating the level of correlation of the primary set with each of the successive sets; means for selecting one of the correlation levels which indicates an optimal level of correlation; and means for determining the time interval between the sensing of the first array of the primary set and the sensing by the second array of the successive set corresponding to the selected correlation level; in addition, the means for correlating may include means for comparing with the primary set each successive set in a plurality of different positions along the first direction and for producing a comparison level indicating the level of comparison of the primary set with each of the successive sets in each of the different positions along the first direction; and means for determining the displacement between the position in which the successive set is sensed and the position corresponding to the indicated comparison level.

REFERENCES:
patent: 4162509 (1979-07-01), Robertson
patent: 4167330 (1979-09-01), Haville

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